抄録
Nichiren held the view that the Latter Day of the Law would mark a period of decay for Buddhism, leading humanity toward destruction, 2,000 years after the passing of Shakyamuni Buddha. In this era, Nichiren be lieved that fundamental salvation for both Japan and the entire Jambudvipa would be achieved by relying on the five characters of the title of the Lo tus Sutra the Mystic Law. His understanding of illness and the best cures was directly connected to his view of salvation in the Latter Day of the Law.
Nichiren identified two major afflictions in this age: slander of the Law (which involved criticizing the true teaching and adhering to other sects, such as Nembutsu, Zen, Shingon, and Vinaya) and icchantika (a lack of faith) as grave illnesses afflicting people in the Latter Day of the Law. He encouraged chanting of the title of the Lotus Sutra as a remedy for these afflictions.
https://ror.org/0496p0503 
